started cleanup and moving from std to no_std

rust/src/hal/v3_hal.rs

@@ -94,7 +94,7 @@ pub(crate) fn create_v3(
     battery_monitor: Box<dyn BatteryInteraction + Send>,
     rtc_module: Box<dyn RTCModuleInteraction + Send>,
 ) -> Result<Box<dyn BoardInteraction<'static> + Send>> {
-    println!("Start v3");
+    log::info!("Start v3");
     let mut clock = PinDriver::input_output(peripherals.gpio15.downgrade())?;
     clock.set_pull(Pull::Floating)?;
     let mut latch = PinDriver::input_output(peripherals.gpio3.downgrade())?;